The lockdown went into effect at about 11 a.m. after someone called the high school and said “someone or a student in the school was in possession of a dangerous device,” according to a statement posted on the Portage Public Schools website.

The lockdown was lifted at 12:45 p.m. following a search of the school by the Portage police and fire departments. School officials said they, along with police, are continuing to investigate the incident.

In a letter to parents posted on the Portage schools website, Superintendent Marsha Wells wrote: “Potential threats such as this are taken very seriously. ... Such behavior is categorized as a felony and will result in permanent expulsion from Portage Public Schools, in addition to legal action.”

She asked people with information about the incident to contact CHS police liaison officer Eric Kline.